Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.The average weekly income of teachers in one state is $390 with a standard deviation of $45. What is the probability of a teacher earning more than $425 a week?
A. 21%
B. 26%
C. 25%
D. 22%
Answer: D
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Solve the problem.On a cloudy day, Sun Woo needed to know the height of a window in a building. Sun Woo positioned a mirror on the ground between himself and the building so that when he looked in the mirror, he saw the window. If the mirror was 18.49 cm from his feet and 32.14 m from the base of the building and Sun Woo's eye was 1.79 m above the ground, how high up on the building was the window located? Round to the nearest unit.
A. 3 m B. 103 m C. 1 m D. 311 m
Write the expression in simplest form. If a radical appears in the denominator, rationalize the denominator.
A. 3xy
B. 5xy
C. 5xy
D. 5xy
Provide an appropriate response.72% = ? (fraction)
A. 
B. 
C. 
D. 
E. none of the above
Solve the problem.An item costs $1346 and is marked down twice due to sales. The first markdown rate is 10% and the second markdown rate is 20%. What is the final selling price?
A. $942.20 B. $673.00 C. $1316.00 D. $969.12